Which of the following statements regarding freshwater fish is true?
A) Freshwater fish frequently drink to obtain salt ions.
B) Freshwater fish use their gills to actively take up salt ions.
C) Freshwater fish lose water through their gills by osmosis.
D) Freshwater fish do not produce urine.
Answer: B
You might also like to view...
The bacterial genetic material is
A. held within a membrane-bound nucleus. B. localized to a nucleoid region. C. circular and loosely packed.
Rods and cones are located in the:
a. lens b. cornea c. pupil d. iris e. retina
Features that contributed to success on land include a
__________ that protects spores. Fill in the blank(s) with the appropriate word(s).
An agriculturalist is very concerned because his wheat crop is suddenly covered with red streaks. When consulted, you identify the issue as a condition known as rust. What would you advise the agriculturalist is the best preventive strategy for addressing the cellular basis of the rust?
A. Rust is caused by rust-colored mushrooms produced as fruiting bodies. Treat the plant to eliminate the fruiting bodies that are recognized as rust. B. Rust is caused by fungi that have reddish spores that emerge from the leaves of infected plants. Treat the plant to eliminate the fungi that causes the rust. C. Rust is caused by fungi that have enzymes for breaking down plant structure. Treat the plant to make it resistant to the enzymes that are causing the rust. D. Rust is caused by fungi that give a reddish cast to soils in which they grow, which is taken up by the plant. Treat the soil to prevent the uptake of the rust-causing fungi.